+++ /dev/null
-/*
- * Carsten Langgaard, carstenl@mips.com
- * Copyright (C) 1999, 2000 MIPS Technologies, Inc. All rights reserved.
- * Copyright (C) 2007 Felix Fietkau <nbd@openwrt.org>
- *
- * This program is free software; you can distribute it and/or modify it
- * under the terms of the GNU General Public License (Version 2) as
- * published by the Free Software Foundation.
- *
- * This program is distributed in the hope it will be useful, but WITHOUT
- * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
- * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
- * for more details.
- *
- * You should have received a copy of the GNU General Public License along
- * with this program; if not, write to the Free Software Foundation, Inc.,
- * 59 Temple Place - Suite 330, Boston MA 02111-1307, USA.
- */
-
-/* FIXME: convert nasty volatile register derefs to readl/writel calls */
-
-#include <linux/types.h>
-#include <linux/pci.h>
-#include <linux/kernel.h>
-#include <linux/module.h>
-#include <linux/init.h>
-#include <linux/delay.h>
-#include <asm/io.h>
-#include <asm/paccess.h>
-#include <asm/amazon/irq.h>
-#include <asm/amazon/amazon.h>
-
-#define AMAZON_PCI_REG32( addr ) (*(volatile u32 *)(addr))
-#ifndef AMAZON_PCI_MEM_BASE
-#define AMAZON_PCI_MEM_BASE 0xb2000000
-#endif
-#define AMAZON_PCI_MEM_SIZE 0x00400000
-#define AMAZON_PCI_IO_BASE 0xb2400000
-#define AMAZON_PCI_IO_SIZE 0x00200000
-
-#define AMAZON_PCI_CFG_BUSNUM_SHF 16
-#define AMAZON_PCI_CFG_DEVNUM_SHF 11
-#define AMAZON_PCI_CFG_FUNNUM_SHF 8
-
-#define PCI_ACCESS_READ 0
-#define PCI_ACCESS_WRITE 1
-
-static struct resource pci_io_resource = {
- .name = "io pci IO space",
-#if 1
- .start = AMAZON_PCI_IO_BASE,
- .end = AMAZON_PCI_IO_BASE + AMAZON_PCI_IO_SIZE - 1,
-#else
- .start = 0,
- .end = 0x00002000 - 1,
-#endif
- .flags = IORESOURCE_IO
-};
-
-static struct resource pci_mem_resource = {
- .name = "ext pci memory space",
- .start = AMAZON_PCI_MEM_BASE,
- .end = AMAZON_PCI_MEM_BASE + AMAZON_PCI_MEM_SIZE - 1,
- .flags = IORESOURCE_MEM
-};
-
-static int amazon_pci_config_access(unsigned char access_type,
- struct pci_bus *bus, unsigned int devfn, unsigned int where, u32 *data)
-{
- unsigned long flags;
- u32 pci_addr;
- u32 val;
- int ret;
-
- /* Amazon support slot from 0 to 15 */
- /* devfn 0 & 0x20 is itself */
- if ((bus->number != 0) || (devfn > 0x7f) || (devfn == 0) || (devfn == 0x20))
- return 1;
-
- local_irq_save(flags);
-
- pci_addr = AMAZON_PCI_CFG_BASE |
- bus->number << AMAZON_PCI_CFG_BUSNUM_SHF |
- devfn << AMAZON_PCI_CFG_FUNNUM_SHF |
- (where & ~0x3);
-
- if (access_type == PCI_ACCESS_WRITE)
- {
-#ifdef CONFIG_SWAP_IO_SPACE
- val = swab32(*data);
-#endif
- ret = put_dbe(val, (u32 *)pci_addr);
- } else {
- ret = get_dbe(val, (u32 *)pci_addr);
-#ifdef CONFIG_SWAP_IO_SPACE
- *data = swab32(val);
-#else
- *data = val;
-#endif
- }
-
- amazon_writel(amazon_readl(PCI_MODE) & (~(1<<PCI_MODE_cfgok_bit)), PCI_MODE);
- amazon_writel(amazon_readl(STATUS_COMMAND_ADDR), STATUS_COMMAND_ADDR);
- amazon_writel(amazon_readl(PCI_MODE) | (~(1<<PCI_MODE_cfgok_bit)), PCI_MODE);
- mb();
- local_irq_restore(flags);
-
- if (((*data) == 0xffffffff) && (access_type == PCI_ACCESS_READ))
- return 1;
-
- return ret;
-}
-
-
-static int amazon_pci_read(struct pci_bus *bus, unsigned int devfn, int where, int size, u32 *val)
-{
- u32 data = 0;
-
- if (amazon_pci_config_access(PCI_ACCESS_READ, bus, devfn, where, &data))
- return PCIBIOS_DEVICE_NOT_FOUND;
-
- if (size == 1)
- *val = (data >> ((where & 3) << 3)) & 0xff;
- else if (size == 2)
- *val = (data >> ((where & 3) << 3)) & 0xffff;
- else
- *val = data;
-
- return PCIBIOS_SUCCESSFUL;
-}
-
-
-static int amazon_pci_write(struct pci_bus *bus, unsigned int devfn, int where, int size, u32 val)
-{
- u32 data = 0;
-
- if (size == 4)
- {
- data = val;
- } else {
- if (amazon_pci_config_access(PCI_ACCESS_READ, bus, devfn, where, &data))
- return PCIBIOS_DEVICE_NOT_FOUND;
-
- if (size == 1)
- data = (data & ~(0xff << ((where & 3) << 3))) |
- (val << ((where & 3) << 3));
- else if (size == 2)
- data = (data & ~(0xffff << ((where & 3) << 3))) |
- (val << ((where & 3) << 3));
- }
-
- if (amazon_pci_config_access(PCI_ACCESS_WRITE, bus, devfn, where, &data))
- return PCIBIOS_DEVICE_NOT_FOUND;
-
- return PCIBIOS_SUCCESSFUL;
-}
-
-static struct pci_ops amazon_pci_ops = {
- amazon_pci_read,
- amazon_pci_write
-};
-
-static struct pci_controller amazon_pci_controller = {
- .pci_ops = &amazon_pci_ops,
- .mem_resource = &pci_mem_resource,
- .mem_offset = 0x00000000UL,
- .io_resource = &pci_io_resource,
- .io_offset = 0x00000000UL,
-};
-
-int __init pcibios_map_irq(const struct pci_dev *dev, u8 slot, u8 pin)
-{
- switch (slot) {
- case 13:
- /* IDSEL = AD29 --> USB Host Controller */
- return INT_NUM_IM2_IRL15;
- case 14:
- /* IDSEL = AD30 --> mini PCI connector */
- return INT_NUM_IM2_IRL14;
- default:
- printk("Warning: no IRQ found for PCI device in slot %d, pin %d\n", slot, pin);
- return 0;
- }
-}
-
-int pcibios_plat_dev_init(struct pci_dev *dev)
-{
- switch(dev->irq) {
- case INT_NUM_IM2_IRL15:
- /*
- * IDSEL = AD29 --> USB Host Controller
- * PCI_INTA/B/C--GPIO Port0.2--EXIN3
- * IN/ALT0:1 ALT1:0
- * PULL UP
- */
- (*AMAZON_GPIO_P0_DIR) = (*AMAZON_GPIO_P0_DIR) & 0xfffffffb;
- (*AMAZON_GPIO_P0_ALTSEL0) = (*AMAZON_GPIO_P0_ALTSEL0)| 4;
- (*AMAZON_GPIO_P0_ALTSEL1) = (*AMAZON_GPIO_P0_ALTSEL1)& 0xfffffffb;
- (*AMAZON_GPIO_P0_PUDSEL) = (*AMAZON_GPIO_P0_PUDSEL) | 4;
- (*AMAZON_GPIO_P0_PUDEN) = (*AMAZON_GPIO_P0_PUDEN) | 4;
- //External Interrupt Node
- (*AMAZON_ICU_EXTINTCR) = (*AMAZON_ICU_EXTINTCR)|0x6000; /* Low Level triggered */
- (*AMAZON_ICU_IRNEN) = (*AMAZON_ICU_IRNEN)|0x8;
- pci_write_config_byte(dev, PCI_INTERRUPT_LINE, dev->irq);
- break;
- case INT_NUM_IM2_IRL14:
- /*
- * IDSEL = AD30 --> mini PCI connector
- * PCI_INTA--GPIO Port0.1--EXIN2
- * IN/ALT0:1 ALT1:0
- * PULL UP
- */
- (*AMAZON_GPIO_P0_DIR) = (*AMAZON_GPIO_P0_DIR) & 0xfffffffd;
- (*AMAZON_GPIO_P0_ALTSEL0) = (*AMAZON_GPIO_P0_ALTSEL0)| 2;
- (*AMAZON_GPIO_P0_ALTSEL1) = (*AMAZON_GPIO_P0_ALTSEL1)& 0xfffffffd;
- (*AMAZON_GPIO_P0_PUDSEL) = (*AMAZON_GPIO_P0_PUDSEL) | 2;
- (*AMAZON_GPIO_P0_PUDEN) = (*AMAZON_GPIO_P0_PUDEN) | 2;
- //External Interrupt Node
- (*AMAZON_ICU_EXTINTCR) = (*AMAZON_ICU_EXTINTCR)|0x600;
- (*AMAZON_ICU_IRNEN) = (*AMAZON_ICU_IRNEN)|0x4;
- pci_write_config_byte(dev, PCI_INTERRUPT_LINE, dev->irq);
- break;
- default:
- return 1;
- }
- return 0;
-}
-
-int __init amazon_pci_init(void)
-{
- u32 temp_buffer;
-
-#ifdef CONFIG_SWAP_IO_SPACE
- AMAZON_PCI_REG32(IRM) = AMAZON_PCI_REG32(IRM) | (1<<27) | (1<<28);
- wmb();
-#endif
-
- AMAZON_PCI_REG32(CLOCK_CONTROL) = AMAZON_PCI_REG32(CLOCK_CONTROL) | (1<<ARB_CTRL_bit);
- amazon_writel(amazon_readl(PCI_MODE) & (~(1<<PCI_MODE_cfgok_bit)), PCI_MODE);
-
- AMAZON_PCI_REG32(STATUS_COMMAND_ADDR) = AMAZON_PCI_REG32(STATUS_COMMAND_ADDR) | (1<<BUS_MASTER_ENABLE_BIT) |(1<<MEM_SPACE_ENABLE_BIT);
-
- temp_buffer = AMAZON_PCI_REG32(PCI_ARB_CTRL_STATUS_ADDR);
- temp_buffer = temp_buffer | (1<< INTERNAL_ARB_ENABLE_BIT);
- temp_buffer = temp_buffer & ~(3<< PCI_MASTER0_REQ_MASK_2BITS);
- temp_buffer = temp_buffer & ~(3<< PCI_MASTER0_GNT_MASK_2BITS);
-
- /* flash */
- temp_buffer = temp_buffer & ~(3<< PCI_MASTER1_REQ_MASK_2BITS);
- temp_buffer = temp_buffer & ~(3<< PCI_MASTER1_GNT_MASK_2BITS);
-
- /* external master */
- temp_buffer = temp_buffer & ~(3<< PCI_MASTER2_REQ_MASK_2BITS);
- temp_buffer = temp_buffer & ~(3<< PCI_MASTER2_GNT_MASK_2BITS);
-
- AMAZON_PCI_REG32(PCI_ARB_CTRL_STATUS_ADDR) = temp_buffer;
- wmb();
-
- AMAZON_PCI_REG32(FPI_ADDRESS_MAP_0) = 0xb2000000;
- AMAZON_PCI_REG32(FPI_ADDRESS_MAP_1) = 0xb2100000;
- AMAZON_PCI_REG32(FPI_ADDRESS_MAP_2) = 0xb2200000;
- AMAZON_PCI_REG32(FPI_ADDRESS_MAP_3) = 0xb2300000;
- AMAZON_PCI_REG32(FPI_ADDRESS_MAP_4) = 0xb2400000;
- AMAZON_PCI_REG32(FPI_ADDRESS_MAP_5) = 0xb2500000;
- AMAZON_PCI_REG32(FPI_ADDRESS_MAP_6) = 0xb2600000;
- AMAZON_PCI_REG32(FPI_ADDRESS_MAP_7) = 0xb2700000;
-
- AMAZON_PCI_REG32(BAR11_MASK) = 0x0c000008;
- AMAZON_PCI_REG32(PCI_ADDRESS_MAP_11) = 0x0;
- AMAZON_PCI_REG32(BAR1_ADDR) = 0x0;
- amazon_writel(amazon_readl(PCI_MODE) | (~(1<<PCI_MODE_cfgok_bit)), PCI_MODE);
- //use 8 dw burse length
- AMAZON_PCI_REG32(FPI_BURST_LENGTH) = 0x303;
-
- amazon_pci_controller.io_map_base = (unsigned long)ioremap(AMAZON_PCI_IO_BASE, AMAZON_PCI_IO_SIZE - 1);
- register_pci_controller(&amazon_pci_controller);
- return 0;
-}
-arch_initcall(amazon_pci_init);
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